Bug 159921

Summary: CAN-2005-1763 x86_64 crash (x86_64-ptrace-overflow)
Product: Red Hat Enterprise Linux 4 Reporter: Mark J. Cox <mjc>
Component: kernelAssignee: Peter Staubach <staubach>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 4.0CC: davej, jbaron
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard: reported=20050601,source=vendorsec,public=20050520
Fixed In Version: RHSA-2005-514 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2005-10-05 13:24:44 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 156322    
Attachments:
Description Flags
Proposed patch none

Description Mark J. Cox 2005-06-09 09:47:31 UTC 
There was a "off by one quad word" error in x86_64 ptrace. This was originally
thought to be unexploitable because it will only store into a unused area, but
better to plug it.  However Andi Kleen stated that it allows a write to a word
40 bytes into the page above the kernel stack of a process which may be exploitable.


http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=c4d1fcf3a2ea89b6d6221fa8b4588c77aff50995
Comment 1 Peter Staubach 2005-07-22 13:30:12 UTC 
Created attachment 117054 [details]
Proposed patch
Comment 6 Red Hat Bugzilla 2005-10-05 13:24:45 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2005-514.html